SHILL-I-SHALL-I; SHILLY-SHALLY adv.
In an irresolute, undecided, or hesitating manner. I am somewhat dainty in making a resolution, because when I make it, I keep it; I don't stand shill-I-shall-I then; if I say 't, I'll do 't. Congreve.
SIBILANT a. 2 definitions
Making a hissing sound; uttered with a hissing sound; hissing; as, s, z, sh, and zh, are sibilant elementary sounds. -- n.